30488813 has 2 divisors, whose sum is σ = 30488814. Its totient is φ = 30488812.

The previous prime is 30488807. The next prime is 30488879. The reversal of 30488813 is 31888403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20268004 + 10220809 = 4502^2 + 3197^2 .

It is a cyclic number.

It is not a de Polignac number, because 30488813 - 2⁴ = 30488797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30488893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15244406 + 15244407.

It is an arithmetic number, because the mean of its divisors is an integer number (15244407).

Almost surely, 2^30488813 is an apocalyptic number.

It is an amenable number.

30488813 is a deficient number, since it is larger than the sum of its proper divisors (1).

30488813 is an equidigital number, since it uses as much as digits as its factorization.

30488813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 30488813 is about 5521.6675923130. The cubic root of 30488813 is about 312.4017841749.

The spelling of 30488813 in words is "thirty million, four hundred eighty-eight thousand, eight hundred thirteen".